Principal Investigator(s):United States Department of Commerce. Bureau of the Census

Summary:

Part of the Census 2000 geographic product series, Census
Tract Relationship Files (CTRF) show how 1990 census tracts relate to
2000 census tracts. The files consist of one record for each 1990
census tract/2000 census tract spatial set. A spatial census tract set
is defined as the area that is uniquely shared between a 1990 census
tract and a 2000 census tract. The CTRF consist of sets of four files
for each of the United States and territories. The purpose of these
files is to assist users in ... (more info)

Part of the Census 2000 geographic product series, Census
Tract Relationship Files (CTRF) show how 1990 census tracts relate to
2000 census tracts. The files consist of one record for each 1990
census tract/2000 census tract spatial set. A spatial census tract set
is defined as the area that is uniquely shared between a 1990 census
tract and a 2000 census tract. The CTRF consist of sets of four files
for each of the United States and territories. The purpose of these
files is to assist users in determining the relationships between 1990
and 2000 census tracts. Two of these files are state-level
entity-based census tract relationship files, one providing a
measurement of change based on population, the second measures change
using street-side mileage. The other two files specifically list
census tracts that have experienced significant change (2.5 percent or
greater): one from the perspective of 1990 census tracts, the other
from the perspective of Census 2000. A set of files for the United
States as a whole is also provided.

Study Description

Citation

United States Department of Commerce. Bureau of the Census. Census of Population and Housing, 2000 [United States]: Census Tract Relationship Files (CTRF). ICPSR13287-v1. Ann Arbor, MI: Inter-university Consortium for Political and Social Research[distributor], 2002. http://doi.org/10.3886/ICPSR13287.v1

Universe:
All census tracts in the United States and its territories
whose boundaries and/or population counts changed between the 1990 and
2000 censuses.

Data Types:
survey data

Data Collection Notes:

When complete, the data collection will include 57
sets of files, one set for each of the 50 states plus separate files
for the United States as a whole, the District of Columbia, Puerto
Rico, American Samoa, Guam, the Northern Mariana Islands, and the
U.S. Virgin Islands.

In previous censuses, these files were called
"comparability" files instead of relationship files.

Methodology

Data Source:

United States Bureau of the Census's internal TIGER
database

Version(s)

Original ICPSR Release:2002-10-04

Version History:

2006-01-12 All files were removed from dataset 229 and flagged as study-level files, so that they will accompany all downloads.